/*
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.examples.shopping;

import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.api.runtime.rule.FactHandle;

public class ShoppingExample {

	public static final void main(String[] args) {
		KieContainer kc = KieServices.Factory.get().getKieClasspathContainer();
		System.out.println(kc.verify().getMessages().toString());
		execute(kc);
	}

	public static void execute(KieContainer kc) {
		KieSession ksession = kc.newKieSession("ShoppingKS");

		Customer mark = new Customer("mark", 0);
		ksession.insert(mark);

		Product shoes = new Product("shoes", 60);
		ksession.insert(shoes);

		Product hat = new Product("hat", 60);
		ksession.insert(hat);

		ksession.insert(new Purchase(mark, shoes));

		FactHandle hatPurchaseHandle = ksession.insert(new Purchase(mark, hat));

		ksession.fireAllRules();

		ksession.delete(hatPurchaseHandle);
		System.out.println("Customer mark has returned the hat");
		ksession.fireAllRules();
	}

	public static class Customer {
		private String name;

		private int discount;

		public Customer(String name, int discount) {
			this.name = name;
			this.discount = discount;
		}

		public String getName() {
			return name;
		}

		public int getDiscount() {
			return discount;
		}

		public void setDiscount(int discount) {
			this.discount = discount;
		}

	}

	public static class Discount {
		private Customer customer;
		private int amount;

		public Discount(Customer customer, int amount) {
			this.customer = customer;
			this.amount = amount;
		}

		public Customer getCustomer() {
			return customer;
		}

		public int getAmount() {
			return amount;
		}

	}

	public static class Product {
		private String name;
		private float price;

		public Product(String name, float price) {
			this.name = name;
			this.price = price;
		}

		public String getName() {
			return name;
		}

		public float getPrice() {
			return price;
		}

	}

	public static class Purchase {
		private Customer customer;
		private Product product;

		public Purchase(Customer customer, Product product) {
			this.customer = customer;
			this.product = product;
		}

		public Customer getCustomer() {
			return customer;
		}

		public Product getProduct() {
			return product;
		}
	}
}
